Sunday

April 20, 2014

April 20, 2014

Posted by **Henry P** on Sunday, May 27, 2012 at 4:35pm.

a) What is the diameter of the circle?

b) What is its circumference?

- Math -
**bobpursley**, Sunday, May 27, 2012 at 4:58pmarea= PI (4x-5)^2

but area= PI r^2

so r= 4x-5

diameter= 2*r

circumference= 2PI*r

**Related Questions**

8th grade math - circle A has a raduis that is twice the length og the raduis of...

Math- HELP - There is a triangle inside of a circle. I have to find area of the ...

MATH HELP PLEASE - You are given two different circles. The diameter of the ...

Algebra - The area of a circle is given by the formula A+pier^2, where r is the ...

Updated Math Question - The radius of circle A is 9 times greater than the ...

Math - The radius of circle A is 9 times greater than the radius of circle B. ...

math - The number of square units in the area of circle P is equal to the number...

8th grade math - The radius of circle M is 3 times the radius of circle P. If ...

math - The area of a circle with radius r is given by the formula A=πr^2. ...

math - I am supposed to find the area of a segment of a circle. The circle is ...